News Details
Polymer prepolymer, epoxy resin flame retardant
2017-11-3 10:59:52
Polymer prepolymer, epoxy resin flame retardant
Epoxy resin is a thermosetting resin is one of the early development are the most widely used, since the advent of more than half a century of continuous improvement in the development, casting, molding, coating, adhesive and composite material can be seen in its presence, especially made great contributions to epoxy composites in recent years for aerospace industry among them, polymer prepolymer and epoxy resin flame retardant improvement has a great relationship.
Curing agent with live wave groups hydrogen can be used as epoxy resin, including amino acids, and phenolic hydroxyl and carboxyl, the pre polymer modified polymer epoxy curing agent not only can improve the performance of epoxy resin itself, but also retains some properties of matrix, thereby greatly improving the shortcomings of epoxy resin.
Some reactive phosphorus containing polyols can be used not only as a macromolecule prepolymer epoxy resin flame retardant, but also with the flame retardant brominated agent for epoxy resin, using polymer prepolymer epoxy resin flame retardant can greatly reduce the amount of brominated flame retardants.
With amide resin as curing agent, due to the long carbon chain and its amino structure, can make epoxy resin after fixed with elastic and cohesion, but also have certain water effect, broad process and formula also has better heat resistance, and the side surface is epoxy resin is insufficient resistance to chemicals and solvents have declined, but because the amide is a mixture of multiple components, also led respectively in two matched amino curing time so long, are used may be the building adhesive.
Do macromolecule prepolymer epoxy curing agent with phenolic resin, because of its large volume and rigid benzene ring can improve the heat resistance and mechanical strength of the epoxy resin, is Jin fancy strengthened epoxy itself advantages, including high performance chemicals have improved. The disadvantage is that the melting point is not low, the process is general, the most likely application is laminated electronic board, which can be used as coating after long chain ether copolymerization.
The most outstanding feature of using amino resin as curing agent is good compatibility, and good mixing effect and process can be achieved without adding additives such as diluent and plasticizer. Mainly used in paint, with light color, color saturation etc..
With carboxyl resin as curing agent is mainly used as powder coating, epoxy resin, carboxyl resin is most saturated polyester resin containing carboxyl, through molecular regulation in the resin content, acid value and functionality to achieve curing density control and toughening effect.
With polyether amine curing agent can do, its characteristic is can improve the impact strength of epoxy resin, toughen while improving process conditions; most amine ether is low viscosity liquid, the oligomers can also be used as raw materials of polyurea spraying.
With amino terminated polyurethane prepolymer as epoxy curing agent for epoxy resin can bring high flexibility, and has very broad gel time adjustment, and compatibility and good manufacturability, but should pay attention to the influence of water, the water would make the decomposition of exchange curing agent.
Finally, epoxy resin and polyurethane, between no fixed or hardening is of no practical value, only the three-dimensional network in order to become a thermosetting resin also have practical applications in the fixed form, undoubtedly the selection and quality of curing agent is a key, and the curing agent of epoxy and various kinds of change and even a lot of curing agent only code, it is difficult to list in detail, only from the application perspective about the structure or.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP) Use:
The Product Has A High Efficiency Flame Retardant, Low Volatility, High Thermal Stability, Water Resistance, Alkali Stable And Soluble In Most Organic Substances, Processing Performance, With Plastic, Moisture, Anti-Static, Anti-Pull, Anti-Compression Performance. Widely Used In Unsaturated Polyester, Polyurethane Foam, Epoxy Resin, Phenolic Resin, Rubber, Soft Polyvinyl Chloride, Synthetic Fibers And Other Plastics And Coatings At High Temperature Pyrolysis, Can Be Used As Emulsifier And Explosion-Proof Agent.
Comparison of glycidyl ester epoxy resin and two phenol propane epoxy resin, it has low viscosity, good manufacturability; high reactivity; adhesion than general epoxy resin, curing material with good mechanical properties; good insulation; good weather resistance, and has good resistance to ultra low temperature, in ultra under the condition of low temperature, still has the binding strength than other types of epoxy resin high. Have good surface gloss, transparency, good weather resistance.
The advantage of glycidyl amine epoxy resin is its high functionality, high epoxy equivalent, high curing density and high heat resistance. Carbon fiber reinforced composites (CFRP) have been used to produce two structural materials for aircraft at home and abroad by using the excellent adhesion and heat resistance of glycidyl amine epoxy resin.
According to the different properties of hydrophilic groups, the waterborne epoxy resin emulsion prepared by chemical modification can be divided into three types: anionic, cationic and nonionic.
By properly introducing functional groups such as carboxylic acid and sulfonic acid into the chain of epoxy resin, the epoxy resin neutralized by salt will have the property of water dispersible. The modified methods are commonly used method for modifying functional monomer chain extension method and free radical grafting.
The functional monomer chain extension method is the use of amine epoxy reactions and some low molecular chain extender such as amino acids, amino acid, amino benzene sulfonic compounds, carboxylic acid, sulfonic acid groups were introduced into the epoxy resin molecular chain, and salt can be dispersed in water phase.
Free radical grafting modification of bisphenol A epoxy resin using molecular chain methylene activity greatly, easy to the formation of free radicals in the peroxide effect, and vinyl monomers can be acrylate and maleic anhydride monomer was grafted onto epoxy resin molecular chain, neutralized by salt can be prepared to self Emulsified Epoxy resin.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Epoxy resin is a thermosetting resin is one of the early development are the most widely used, since the advent of more than half a century of continuous improvement in the development, casting, molding, coating, adhesive and composite material can be seen in its presence, especially made great contributions to epoxy composites in recent years for aerospace industry among them, polymer prepolymer and epoxy resin flame retardant improvement has a great relationship.
Curing agent with live wave groups hydrogen can be used as epoxy resin, including amino acids, and phenolic hydroxyl and carboxyl, the pre polymer modified polymer epoxy curing agent not only can improve the performance of epoxy resin itself, but also retains some properties of matrix, thereby greatly improving the shortcomings of epoxy resin.
Some reactive phosphorus containing polyols can be used not only as a macromolecule prepolymer epoxy resin flame retardant, but also with the flame retardant brominated agent for epoxy resin, using polymer prepolymer epoxy resin flame retardant can greatly reduce the amount of brominated flame retardants.
With amide resin as curing agent, due to the long carbon chain and its amino structure, can make epoxy resin after fixed with elastic and cohesion, but also have certain water effect, broad process and formula also has better heat resistance, and the side surface is epoxy resin is insufficient resistance to chemicals and solvents have declined, but because the amide is a mixture of multiple components, also led respectively in two matched amino curing time so long, are used may be the building adhesive.
Do macromolecule prepolymer epoxy curing agent with phenolic resin, because of its large volume and rigid benzene ring can improve the heat resistance and mechanical strength of the epoxy resin, is Jin fancy strengthened epoxy itself advantages, including high performance chemicals have improved. The disadvantage is that the melting point is not low, the process is general, the most likely application is laminated electronic board, which can be used as coating after long chain ether copolymerization.
The most outstanding feature of using amino resin as curing agent is good compatibility, and good mixing effect and process can be achieved without adding additives such as diluent and plasticizer. Mainly used in paint, with light color, color saturation etc..
With carboxyl resin as curing agent is mainly used as powder coating, epoxy resin, carboxyl resin is most saturated polyester resin containing carboxyl, through molecular regulation in the resin content, acid value and functionality to achieve curing density control and toughening effect.
With polyether amine curing agent can do, its characteristic is can improve the impact strength of epoxy resin, toughen while improving process conditions; most amine ether is low viscosity liquid, the oligomers can also be used as raw materials of polyurea spraying.
With amino terminated polyurethane prepolymer as epoxy curing agent for epoxy resin can bring high flexibility, and has very broad gel time adjustment, and compatibility and good manufacturability, but should pay attention to the influence of water, the water would make the decomposition of exchange curing agent.
Finally, epoxy resin and polyurethane, between no fixed or hardening is of no practical value, only the three-dimensional network in order to become a thermosetting resin also have practical applications in the fixed form, undoubtedly the selection and quality of curing agent is a key, and the curing agent of epoxy and various kinds of change and even a lot of curing agent only code, it is difficult to list in detail, only from the application perspective about the structure or.
Tris (1,3-Dichloro-2-Propyl) Phosphate (Flame Retardant TDCPP) Use:
The Product Has A High Efficiency Flame Retardant, Low Volatility, High Thermal Stability, Water Resistance, Alkali Stable And Soluble In Most Organic Substances, Processing Performance, With Plastic, Moisture, Anti-Static, Anti-Pull, Anti-Compression Performance. Widely Used In Unsaturated Polyester, Polyurethane Foam, Epoxy Resin, Phenolic Resin, Rubber, Soft Polyvinyl Chloride, Synthetic Fibers And Other Plastics And Coatings At High Temperature Pyrolysis, Can Be Used As Emulsifier And Explosion-Proof Agent.
Comparison of glycidyl ester epoxy resin and two phenol propane epoxy resin, it has low viscosity, good manufacturability; high reactivity; adhesion than general epoxy resin, curing material with good mechanical properties; good insulation; good weather resistance, and has good resistance to ultra low temperature, in ultra under the condition of low temperature, still has the binding strength than other types of epoxy resin high. Have good surface gloss, transparency, good weather resistance.
The advantage of glycidyl amine epoxy resin is its high functionality, high epoxy equivalent, high curing density and high heat resistance. Carbon fiber reinforced composites (CFRP) have been used to produce two structural materials for aircraft at home and abroad by using the excellent adhesion and heat resistance of glycidyl amine epoxy resin.
According to the different properties of hydrophilic groups, the waterborne epoxy resin emulsion prepared by chemical modification can be divided into three types: anionic, cationic and nonionic.
By properly introducing functional groups such as carboxylic acid and sulfonic acid into the chain of epoxy resin, the epoxy resin neutralized by salt will have the property of water dispersible. The modified methods are commonly used method for modifying functional monomer chain extension method and free radical grafting.
The functional monomer chain extension method is the use of amine epoxy reactions and some low molecular chain extender such as amino acids, amino acid, amino benzene sulfonic compounds, carboxylic acid, sulfonic acid groups were introduced into the epoxy resin molecular chain, and salt can be dispersed in water phase.
Free radical grafting modification of bisphenol A epoxy resin using molecular chain methylene activity greatly, easy to the formation of free radicals in the peroxide effect, and vinyl monomers can be acrylate and maleic anhydride monomer was grafted onto epoxy resin molecular chain, neutralized by salt can be prepared to self Emulsified Epoxy resin.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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